<template>
  <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar
      class="page-nav-bar"
      left-arrow
      title="黑马头条"
      @click-left="$router.back()"
    ></van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      {{ articleId }}
      <!-- 加载中 -->
      <div v-if="loading" class="loading-wrap">
        <van-loading color="#3296fa" vertical>加载中</van-loading>
      </div>
      <!-- /加载中 -->

      <!-- 加载完成-文章详情 -->
      <div v-else-if="article.title" class="article-detail">
        <!-- 文章标题 -->
        <h1 class="article-title">{{ article.title }}</h1>
        <!-- /文章标题 -->

        <!-- 用户信息 -->
        <van-cell class="user-info" center :border="false">
          <van-image
            class="avatar"
            slot="icon"
            round
            fit="cover"
            :src="article.aut_photo"
          />
          <div slot="title" class="user-name">{{ article.aut_name }}</div>
          <div slot="label" class="publish-date">
            {{ article.pubdate | format }}
          </div>

          <van-button
            @click="loadingBtn"
            :loading="loadingFlag"
            type="info"
            :text="text"
          />
          <!-- <van-button type="info" loading-text="已关注" /> -->
        </van-cell>
        <!-- /用户信息 -->

        <!-- 文章内容 -->
        <div
          class="article-content markdown-body"
          v-html="article.content"
          ref="article-content"
        ></div>
        <van-divider>正文结束</van-divider>

        <!-- 文章评论列表 -->
        <comment-list
          @showpost2="showpost2"
          :list="list"
          :source="article.art_id"
        ></comment-list>
        <!-- /文章评论列表 -->

        <!-- 底部区域 -->
        <!-- <div class="article-bottom">
          <van-button
            class="comment-btn"
            type="default"
            round
            size="small"
            @click="isPostShow = true"
          >写评论</van-button>
          <van-icon
            class="comment-icon"
            name="comment-o"
            :info="totalCommentCount"
          />
         
          <van-icon name="share" color="#777777"></van-icon>
        </div> -->
        <!-- /底部区域 -->

        <div style="position:fixed;bottom:0;width:100%">
          <van-cell style="justify-content:space-between">
            <van-button
              @click="showPost = true"
              slot="title"
              round
              block
              type="info"
              size="small"
              native-type="submit"
            >
              提交
            </van-button>

            <div
              style="flex:1;display:flex;justify-content:space-around;align-items:center;"
              slot="extra"
            >
              <van-icon name="comment-o" badge="9" />
              <!-- <van-icon  name="star-o" /> -->

              <!-- 
                    v-model ='true'    一个组件只能使用一次   用于组件上
                  1、====通过 props  获取 value====  props:['value']
                  2、默认触发input事件  ====父组件

                  model: {  重定义value和input事件
                    prop: 'checked', //  value
                    event: 'change'  //  input
                  },
                  props: {
                    checked: Boolean
                  },

                  $event====传递的参数
                 -->
              <!-- <collect-article @collectedlight='article.is_collected=$event'  :article='article'></collect-article> -->
              <collect-article
                @qqq="article.is_collected = $event"
                v-model="article.is_collected"
                :art_id="article.art_id"
              ></collect-article>

              <!-- <van-icon name="good-job-o" /> -->
              <like-article
                @qqq="article.attitude = $event"
                v-model="article.attitude"
                :art_id="article.art_id"
              ></like-article>
              <van-icon name="share" />
            </div>
          </van-cell>
        </div>
      </div>
      <!-- /加载完成-文章详情 -->

      <!-- 加载失败：404 -->
      <div v-else-if="errStatus === 404" class="error-wrap">
        <van-icon name="failure" />
        <p class="text">该资源不存在或已删除！</p>
      </div>
      <!-- /加载失败：404 -->

      <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
      <div v-else class="error-wrap">
        <van-icon name="failure" />
        <p class="text">内容加载失败！</p>
        <van-button class="retry-btn" @click="loadArticle">点击重试</van-button>
      </div>
      <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
    </div>

    <!-- 图片预览 -->
    <van-image-preview v-model="show"></van-image-preview>

    <!-- 对文章进行评论的对话框 -->
    <van-popup v-model="showPost" position="bottom">
      <comment-post
        @postshow="postshow"
        :target="article.art_id"
      ></comment-post>
    </van-popup>

    <!-- 对评论进行回复 -->
    <van-popup
      v-model="showPost2"
      position="bottom"
      :style="{ height: '100%' }"
    >
      <comment-replay @postshow22="postshow22" :comment="commentobj"></comment-replay>
    </van-popup>
  </div>
</template>

<script>
import { getArticleByIdApi } from "@/api";

import { ImagePreview } from "vant";

import collectArticle from "@/components/collect-article";
import likeArticle from "@/components/like-article";

import commentPost from "./component/comment-post";
import commentList from "./component/comment-list";
import commentReplay from "./component/comment-replay";
export default {
  props: ["articleId"],
  name: "",
  provide: function() {
    return {
      articleId: this.articleId
    };
  },
  data() {
    return {
      loading: true,
      article: {},
      errStatus: null,
      loadingFlag: false, //  设限制loading是否开启
      text: "关注",
      flag: false, //定义是否关注

      //   图片预览
      show: false,
      index: 0,
      //images:[]

      // 评论相关的
      showPost: false,
      list: [],
      showPost2: false,
      commentobj: {}
    };
  },
  methods: {
    // qq(q){
    //   this.article.is_collected = q
    // },
    async getArticleInfo() {
      try {
        const { data: res } = await getArticleByIdApi(this.articleId);
        console.log(res, 66666);
        this.loading = false;
        console.log(111);
        this.article = res.data;
        console.log(222);

        //  获取图片资源
        setTimeout(() => {
          this.previewImage(); //初次进入就获取 所有的图片资源
        }, 0);
      } catch (err) {
        if (err || err.response.status == 404) {
          this.errStatus = 404;
        }
      }
    },

    //  点击关注按钮

    loadingBtn() {
      /* 
        点击关注按钮  显示loading效果
        之后就关闭loading
        
        */
      this.loadingFlag = !this.loadingFlag;
      if (this.flag) {
        //  目前是已关注  ===取消
        setTimeout(() => {
          this.loadingFlag = false;
          this.text = "关注";
        }, 2000);
      } else {
        //  未关注===关注     关注=》已关注

        setTimeout(() => {
          this.loadingFlag = false;
          this.text = "已关注";
        }, 2000);
      }

      this.flag = !this.flag;
    },

    //  图片预览
    //  获取预览图片

    previewImage() {
      var imgBox = this.$refs["article-content"];
      var img = imgBox.querySelectorAll("img");
      var images = [];
      //  循环所有的img获取图片资源  并且给每一张图片绑定点击事件
      img.forEach((item, index) => {
        //console.log(item,22222);
        images.push(item.src);
        item.onclick = () => {
          console.log(1111122222);
          //  点击每张图就显示图片预览
          this.show = true;
          ImagePreview({
            images: images, //  这里是显示需要预览的图片数组
            startPosition: index //  显示第几张
          });
        };
      });

      //console.log(this.images, 6666);
    },

    /* 添加评论 */
    postshow(obj) {
      this.showPost = false;
      this.list.unshift(obj);
    },

    showpost2(commentobj) {
      console.log(commentobj, 8888);
      this.showPost2 = true;
      this.commentobj = commentobj;
    },

    postshow22(){
      this.showPost2 = false;
    }
  },
  created() {
    this.getArticleInfo();
  },
  mounted() {
    // this.$nextTick(() => {
    //   this.previewImage();
    // });
  },
  components: {
    collectArticle,
    likeArticle,

    commentPost,
    commentList,
    commentReplay
  }
};
</script>
<style scoped lang="less">
@import "./github-markdown.css";
.article-container {
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 100px;
    bottom: 0;
    background-color: #fff;
  }
  .article-detail {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    /deep/ .van-icon {
      font-size: 40px;
    }
    .comment-icon {
      top: 2px;
      color: #777;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
    .btn-item {
      border: none;
      padding: 0;
      height: 40px;
      line-height: 40px;
      color: #777777;
    }
    .collect-btn--collected {
      color: #ffa500;
    }
    .like-btn--liked {
      color: #e5645f;
    }
  }
}
</style>
